Copper(II) chelates with some photographic color intermediates. Structure-stability relationships.
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概要
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Acid dissociation constants, p<I>K</I><SUB>1</SUB> of a series of benzoylacetanilides (Ia–i) have been determined potentiometrically in 50 vol% ethanol–water media at 30 °C. The stability constants, logβ<SUB>1</SUB>, of their copper(II) chelates have also been determined. The effects of substituents on the anilide moiety of the ligand on the equilibria are discussed. The data were correlated by the equations: p<I>K</I><SUB>1</SUB>=9.39–0.916 σ; logβ<SUB>1</SUB>=1.34p<I>K</I><SUB>1</SUB>−5.42; and logβ<SUB>1</SUB>=7.20–1.44 σ. These results were taken to imply that the stabilization by dative metal-to-ligand π-bonding is not significant in copper(II)–benzoylacetanilide complexes.
- 公益社団法人 日本化学会の論文
著者
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Shawali Ahmad
Department of Chemistry, Faculty of Science, University of Cairo
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El-Hilaly Ahmad
Department of Chemistry, Faculty of Science, University of Kuwait
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El-Ezaby Mohammad
Department of Chemistry, Faculty of Science, University of Kuwait
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